CA2247970A1 - Methode pour faire des preformes de guide d'onde optique a coeur segmente - Google Patents

Methode pour faire des preformes de guide d'onde optique a coeur segmente Download PDF

Info

Publication number: CA2247970A1
Authority: CA; Canada
Prior art keywords: core region; dopant; tube; rod; silica
Prior art date: 1997-10-29
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Abandoned

Application number

CA002247970A

Other languages

English (en)

Inventor

George E. Berkey

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Corning Inc

Original Assignee

Corning Inc

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1997-10-29

Filing date

1998-09-23

Publication date

1999-04-29

1998-09-23 Application filed by Corning Inc filed Critical Corning Inc

1999-04-29 Publication of CA2247970A1 publication Critical patent/CA2247970A1/fr

Status Abandoned legal-status Critical Current

Links

230000003287 optical effect Effects 0.000 title claims abstract description 24
238000004519 manufacturing process Methods 0.000 title claims abstract description 10
VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 94
239000002019 doping agent Substances 0.000 claims abstract description 45
239000000835 fiber Substances 0.000 claims abstract description 40
239000000377 silicon dioxide Substances 0.000 claims abstract description 32
239000004071 soot Substances 0.000 claims abstract description 31
238000005253 cladding Methods 0.000 claims abstract description 12
238000000034 method Methods 0.000 claims description 57
229910052731 fluorine Inorganic materials 0.000 claims description 31
239000011737 fluorine Substances 0.000 claims description 31
239000011521 glass Substances 0.000 claims description 26
239000000460 chlorine Substances 0.000 claims description 23
ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 22
229910052801 chlorine Inorganic materials 0.000 claims description 22
YBMRDBCBODYGJE-UHFFFAOYSA-N germanium dioxide Chemical compound O=[Ge]=O YBMRDBCBODYGJE-UHFFFAOYSA-N 0.000 claims description 20
238000000151 deposition Methods 0.000 claims description 15
230000007423 decrease Effects 0.000 claims description 11
239000006185 dispersion Substances 0.000 claims description 10
239000003085 diluting agent Substances 0.000 claims description 7
238000010438 heat treatment Methods 0.000 claims description 6
PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims 3
230000032683 aging Effects 0.000 abstract description 11
239000001257 hydrogen Substances 0.000 abstract description 11
229910052739 hydrogen Inorganic materials 0.000 abstract description 11
UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 10
YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 28
239000007789 gas Substances 0.000 description 27
239000001307 helium Substances 0.000 description 11
229910052734 helium Inorganic materials 0.000 description 11
SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 11
239000013307 optical fiber Substances 0.000 description 10
XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
235000012239 silicon dioxide Nutrition 0.000 description 8
238000007596 consolidation process Methods 0.000 description 7
239000005373 porous glass Substances 0.000 description 7
238000004140 cleaning Methods 0.000 description 6
239000000463 material Substances 0.000 description 5
230000008021 deposition Effects 0.000 description 4
230000000994 depressogenic effect Effects 0.000 description 4
238000001035 drying Methods 0.000 description 4
238000005245 sintering Methods 0.000 description 4
229910004014 SiF4 Inorganic materials 0.000 description 3
230000015572 biosynthetic process Effects 0.000 description 3
238000005229 chemical vapour deposition Methods 0.000 description 3
238000012545 processing Methods 0.000 description 3
ABTOQLMXBSRXSM-UHFFFAOYSA-N silicon tetrafluoride Chemical compound F[Si](F)(F)F ABTOQLMXBSRXSM-UHFFFAOYSA-N 0.000 description 3
KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 2
PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
239000008246 gaseous mixture Substances 0.000 description 2
239000000203 mixture Substances 0.000 description 2
238000012986 modification Methods 0.000 description 2
230000004048 modification Effects 0.000 description 2
239000002245 particle Substances 0.000 description 2
238000007740 vapor deposition Methods 0.000 description 2
229910015844 BCl3 Inorganic materials 0.000 description 1
241000201976 Polycarpon Species 0.000 description 1
229910003910 SiCl4 Inorganic materials 0.000 description 1
QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
230000009286 beneficial effect Effects 0.000 description 1
239000012459 cleaning agent Substances 0.000 description 1
239000011248 coating agent Substances 0.000 description 1
238000000576 coating method Methods 0.000 description 1
239000002131 composite material Substances 0.000 description 1
239000000470 constituent Substances 0.000 description 1
238000011109 contamination Methods 0.000 description 1
230000003247 decreasing effect Effects 0.000 description 1
230000007547 defect Effects 0.000 description 1
238000005530 etching Methods 0.000 description 1
150000002431 hydrogen Chemical class 0.000 description 1
125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
-1 hydroxyl ions Chemical class 0.000 description 1
239000012535 impurity Substances 0.000 description 1
239000011261 inert gas Substances 0.000 description 1
239000001301 oxygen Substances 0.000 description 1
229910052760 oxygen Inorganic materials 0.000 description 1
238000005268 plasma chemical vapour deposition Methods 0.000 description 1
239000011148 porous material Substances 0.000 description 1
230000001902 propagating effect Effects 0.000 description 1
FDNAPBUWERUEDA-UHFFFAOYSA-N silicon tetrachloride Chemical compound Cl[Si](Cl)(Cl)Cl FDNAPBUWERUEDA-UHFFFAOYSA-N 0.000 description 1
239000007787 solid Substances 0.000 description 1
239000000126 substance Substances 0.000 description 1
FAQYAMRNWDIXMY-UHFFFAOYSA-N trichloroborane Chemical compound ClB(Cl)Cl FAQYAMRNWDIXMY-UHFFFAOYSA-N 0.000 description 1

Classifications

- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
- C03B37/01211—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments by inserting one or more rods or tubes into a tube
- C03B37/01214—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments by inserting one or more rods or tubes into a tube for making preforms of multifibres, fibre bundles other than multiple core preforms
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
- C03B37/01211—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments by inserting one or more rods or tubes into a tube
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
- C03B37/01225—Means for changing or stabilising the shape, e.g. diameter, of tubes or rods in general, e.g. collapsing
- C03B37/01257—Heating devices therefor
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2201/00—Type of glass produced
- C03B2201/06—Doped silica-based glasses
- C03B2201/08—Doped silica-based glasses doped with boron or fluorine or other refractive index decreasing dopant
- C03B2201/12—Doped silica-based glasses doped with boron or fluorine or other refractive index decreasing dopant doped with fluorine
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2201/00—Type of glass produced
- C03B2201/06—Doped silica-based glasses
- C03B2201/30—Doped silica-based glasses doped with metals, e.g. Ga, Sn, Sb, Pb or Bi
- C03B2201/31—Doped silica-based glasses doped with metals, e.g. Ga, Sn, Sb, Pb or Bi doped with germanium
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2203/00—Fibre product details, e.g. structure, shape
- C03B2203/10—Internal structure or shape details
- C03B2203/22—Radial profile of refractive index, composition or softening point
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2203/00—Fibre product details, e.g. structure, shape
- C03B2203/10—Internal structure or shape details
- C03B2203/22—Radial profile of refractive index, composition or softening point
- C03B2203/29—Segmented core fibres
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2203/00—Fibre product details, e.g. structure, shape
- C03B2203/36—Dispersion modified fibres, e.g. wavelength or polarisation shifted, flattened or compensating fibres (DSF, DFF, DCF)
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
- C03B37/01225—Means for changing or stabilising the shape, e.g. diameter, of tubes or rods in general, e.g. collapsing
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates

Landscapes

Chemical & Material Sciences (AREA)
Engineering & Computer Science (AREA)
Geochemistry & Mineralogy (AREA)
Life Sciences & Earth Sciences (AREA)
General Life Sciences & Earth Sciences (AREA)
Manufacturing & Machinery (AREA)
Materials Engineering (AREA)
Organic Chemistry (AREA)
General Chemical & Material Sciences (AREA)
Chemical Kinetics & Catalysis (AREA)
Manufacture, Treatment Of Glass Fibers (AREA)
Optical Integrated Circuits (AREA)
Glass Compositions (AREA)
Glass Melting And Manufacturing (AREA)
Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)

CA002247970A 1997-10-29 1998-09-23 Methode pour faire des preformes de guide d'onde optique a coeur segmente Abandoned CA2247970A1 (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
US6344197P	1997-10-29	1997-10-29
US60/063,441		1997-10-29

Publications (1)

Publication Number	Publication Date
CA2247970A1 true CA2247970A1 (fr)	1999-04-29

Family

ID=22049213

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA002247970A Abandoned CA2247970A1 (fr)	1997-10-29	1998-09-23	Methode pour faire des preformes de guide d'onde optique a coeur segmente

Country Status (10)

Country	Link
US (1)	US6189342B1 (fr)
EP (1)	EP0915064B1 (fr)
JP (1)	JPH11209141A (fr)
KR (1)	KR19990037447A (fr)
CN (1)	CN1243811A (fr)
AT (1)	ATE219034T1 (fr)
BR (1)	BR9804307A (fr)
CA (1)	CA2247970A1 (fr)
DE (1)	DE69805934T2 (fr)
ID (1)	ID21136A (fr)

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* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP1061055A4 (fr) *	1998-02-03	2006-11-15	Sumitomo Electric Industries	Procede de fabrication de materiau de base pour fibres optiques
JPH11237514A (ja) *	1998-02-20	1999-08-31	Shin Etsu Chem Co Ltd	グレーティング用光ファイバ、グレーティング用光ファイバ母材およびその光ファイバ母材の製造方法
WO2000026150A1 (fr) *	1998-10-29	2000-05-11	Sumitomo Electric Industries, Ltd.	Procede de production de preforme et de fibre optique
JP3551895B2 (ja) *	2000-01-12	2004-08-11	住友電気工業株式会社	石英系光導波路及びその製造方法
JP2003531796A (ja) *	2000-03-25	2003-10-28	ヘライオステネフォーアーゲー	サブストレート管及び光ファイバーのプリフォームを製造する方法
DE10050324C1 (de) *	2000-10-10	2001-12-13	Heraeus Quarzglas	Verfahren zur Herstellung eines Rohres aus dotiertem Quarzglas, rohrförmiges Halbzeug aus porösem Quarzglas, daraus hergestelltes Quarzglasrohr und Verwendung desselben
WO2002055445A2 (fr) *	2001-01-12	2002-07-18	Corning Incorporated	Fibre optique, preforme, procede de fabrication de ladite fibre et composant fabrique a partir de cette fibre
US6574994B2 (en) *	2001-06-18	2003-06-10	Corning Incorporated	Method of manufacturing multi-segmented optical fiber and preform
US6966201B2 (en) *	2002-08-16	2005-11-22	Furukawa Electric North America, Inc.	High-temperature sintering of soot bodies doped using molecular stuffing
CN1310047C (zh) *	2002-12-18	2007-04-11	古河电气工业株式会社	光纤和使用它的光传送路
JP5176274B2 (ja) *	2003-05-19	2013-04-03	住友電気工業株式会社	光ファイバとその製造方法
US7567740B2 (en) *	2003-07-14	2009-07-28	Massachusetts Institute Of Technology	Thermal sensing fiber devices
US7295734B2 (en) *	2003-07-14	2007-11-13	Massachusetts Institute Of Technology	Optoelectronic fiber codrawn from conducting, semiconducting, and insulating materials
US20100296782A1 (en) *	2007-10-23	2010-11-25	Ivan Vladimirovich Nikolin	Optical fibre having resistance to hydrogen-induced attenuation
RU2437129C1 (ru) *	2010-03-24	2011-12-20	Закрытое акционерное общество "Профотек"	Способ изготовления двулучепреломляющего микроструктурного оптического волокна
DK2418523T3 (en)	2010-08-12	2017-01-09	Draka Comteq Bv	A multimode optical fiber having immersed gradientindeks
NL2005220C2 (en) *	2010-08-12	2012-02-14	Draka Comteq Bv	Depressed graded index multi-mode optical fiber.
US9873629B2 (en) *	2011-06-30	2018-01-23	Corning Incorporated	Methods for producing optical fiber preforms with low index trenches
CN102981221B (zh) *	2012-12-03	2015-02-18	连云港市盛昌照明电器有限公司	一种光纤连接器用套管的制备方法
NL2009962C2 (en) *	2012-12-11	2014-06-12	Draka Comteq Bv	Method for activating an inner surface of a hollow glass substrate tube for the manufacturing of an optical fiber preform.
JP2014152077A (ja) *	2013-02-08	2014-08-25	Shin Etsu Chem Co Ltd	光ファイバ母材延伸用加熱炉
US10571628B2 (en) *	2017-11-20	2020-02-25	Corning Incorporated	Low loss optical fiber with core codoped with two or more halogens
US11401196B2 (en)	2018-06-01	2022-08-02	Corning Incorporated	Microstructured glass articles with at least 100 core elements and methods for forming the same
CN112573816B (zh) *	2019-09-29	2021-09-14	中天科技精密材料有限公司	掺氟石英套管及制造方法
CN116891335A (zh) *	2023-07-13	2023-10-17	江苏亨通光导新材料有限公司	一种大有效面积超低损耗光纤的制备方法

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DE2536456C2 (de)	1975-08-16	1981-02-05	Heraeus Quarzschmelze Gmbh, 6450 Hanau	Halbzeug für die Herstellung von Lichtleitfasern und Verfahren zur Herstellung des Halbzeugs
JPS596821B2 (ja) *	1976-09-06	1984-02-14	株式会社フジクラ	多成分系ガラスフアイバの製造方法
US4125388A (en)	1976-12-20	1978-11-14	Corning Glass Works	Method of making optical waveguides
JPS6022652B2 (ja) *	1978-09-28	1985-06-03	住友電気工業株式会社	光伝送用ガラスフアイバ−の製造方法
JPS5924092B2 (ja)	1978-12-29	1984-06-07	三菱マテリアル株式会社	光フアイバ母材の製造法
CA1136911A (fr) *	1979-10-25	1982-12-07	Takao Edahiro	Fibre optique pour les transmissions, et methode de fabrication
JPS5792536A (en) *	1980-11-29	1982-06-09	Dainichi Nippon Cables Ltd	Preparation of parent material of optical glass fiber
US4629485A (en)	1983-09-26	1986-12-16	Corning Glass Works	Method of making fluorine doped optical preform and fiber and resultant articles
JPS60226422A (ja)	1984-04-20	1985-11-11	Sumitomo Electric Ind Ltd	シングルモ−ドフアイバ用中間体の製造方法
JPS61117126A (ja)	1984-11-13	1986-06-04	Sumitomo Electric Ind Ltd	光フアイバ用母材の製造方法
JPH0753591B2 (ja) *	1985-08-14	1995-06-07	住友電気工業株式会社	光フアイバ用母材の製造方法
AU583715B2 (en) *	1986-06-11	1989-05-04	Sumitomo Electric Industries, Ltd.	Method for manufacturing basic material for optical fiber
KR900003449B1 (ko) *	1986-06-11	1990-05-19	스미도모덴기고오교오 가부시기가이샤	분산 시프트싱글모우드 광파이버 및 그 제조방법
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JPH02180727A (ja) *	1989-01-05	1990-07-13	Furukawa Electric Co Ltd:The	光ファイバ用母材の製造方法
US5180410A (en)	1990-07-30	1993-01-19	Corning Incorporated	Method of making polarization retaining fiber
DE4028275A1 (de) *	1990-09-06	1992-03-12	Kabelmetal Electro Gmbh	Verfahren zur herstellung von glasfaser-lichtwellenleitern mit erhoehter zugfestigkeit
US5152818A (en) *	1990-11-09	1992-10-06	Corning Incorporated	Method of making polarization retaining fiber
US5149349A (en)	1991-07-11	1992-09-22	Corning Incorporated	Method of making polarization retaining fiber with an elliptical core, with collapsed apertures
US5203898A (en) *	1991-12-16	1993-04-20	Corning Incorporated	Method of making fluorine/boron doped silica tubes
KR0162604B1 (ko) *	1994-10-07	1999-04-15	김광호	광 섬유 모재 제조 방법
US5917109A (en) *	1994-12-20	1999-06-29	Corning Incorporated	Method of making optical fiber having depressed index core region
CA2161939A1 (fr) *	1994-12-20	1996-06-21	George E. Berkey	Procede de fabrication de fibres optiques comportant une zone a indice de refraction reduit
JP3406107B2 (ja) *	1995-01-31	2003-05-12	信越石英株式会社	石英ガラスの製造方法

1998
- 1998-09-23 CA CA002247970A patent/CA2247970A1/fr not_active Abandoned
- 1998-09-24 AT AT98118121T patent/ATE219034T1/de not_active IP Right Cessation
- 1998-09-24 EP EP98118121A patent/EP0915064B1/fr not_active Expired - Lifetime
- 1998-09-24 DE DE69805934T patent/DE69805934T2/de not_active Expired - Fee Related
- 1998-09-24 US US09/159,738 patent/US6189342B1/en not_active Expired - Fee Related
- 1998-10-20 ID IDP981384A patent/ID21136A/id unknown
- 1998-10-28 KR KR1019980045368A patent/KR19990037447A/ko not_active Withdrawn
- 1998-10-28 JP JP10306783A patent/JPH11209141A/ja active Pending
- 1998-10-28 CN CN98123816A patent/CN1243811A/zh active Pending
- 1998-10-29 BR BR9804307-2A patent/BR9804307A/pt not_active Application Discontinuation

Also Published As

Publication number	Publication date
US6189342B1 (en)	2001-02-20
AU8941198A (en)	1999-05-20
KR19990037447A (ko)	1999-05-25
ATE219034T1 (de)	2002-06-15
DE69805934D1 (de)	2002-07-18
DE69805934T2 (de)	2003-01-16
JPH11209141A (ja)	1999-08-03
BR9804307A (pt)	1999-12-07
ID21136A (id)	1999-04-29
CN1243811A (zh)	2000-02-09
EP0915064B1 (fr)	2002-06-12
EP0915064A1 (fr)	1999-05-12
AU733824B2 (en)	2001-05-24

Legal Events

Date	Code	Title	Description
2004-09-23	FZDE	Discontinued

Publication	Publication Date	Title
EP0915064B1 (fr)	2002-06-12	Procédé de fabrication de préformes pour des guides optiques à coeur segmenté
US5917109A (en)	1999-06-29	Method of making optical fiber having depressed index core region
AU648181B2 (en)	1994-04-14	Method of making polarization retaining fiber
EP0484659B1 (fr)	1997-05-02	Procédé pour la fabrication d'une fibre à maintien de polarisation
US4453961A (en)	1984-06-12	Method of making glass optical fiber
EP0182250B1 (fr)	1991-09-11	Procédé de fabrication d'une préforme en verre pour fibres optiques
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